TXT is a DNS record, that contains data in human-readable form for external sources to obtain info about a specific domain name or subdomain. In the most common scenario, this type of record is employed to prove that you own a domain if you are trying to add it to a search engine or to some web traffic analytics platform. Since only the domain name owner/administrator may add custom DNS records, the TXT record functions as a verification of ownership for the company providing the service. Another popular use for this type of records is the e-mail SPF (Sender Policy Framework) protection, that ensures that a particular email address won't be spoofed and that others will not get junk mail from allegedly your mailbox. The TXT record features information about the mail server where your digital messages originate from and serves as verification that it's a reliable one. As there are no standards regarding the content of such a record, you could add any other information also.